Analog Devices SigmaDSP ADAU1463 User manual

EVAL-ADAU1467Z
UG-1134
One Technology Way •P. O. Box 9106 •Norwood, MA 02062-9106, U.S.A. •Tel: [phone] •Fax: [phone] •
www.analog.com
Evaluating the ADAU1463 and ADAU1467 SigmaDSP Audio Processors
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.Rev. A (Draft) | Page 1 of 55
FEATURES
4 analog inputs
8 analog outputs
Stereo S/PDIF input and output
Self boot EEPROM
Headers for interfacing to off board peripherals
EVALUATION KIT CONTENTS
EVAL-ADAU1467Z evaluation board
EVAL-ADUSB2EBZ (USBi) communications adapter
USB cable with Mini-B plug
6 V ac to dc power supply
HARDWARE REQUIRED
PC running Windows XP, Windows Vista, or Windows 7
Analog, stereo audio source with an output cable terminated
with a 3.5 mm (1/8 inch) plug (for the analog input)
Headphones, desktop speakers, or audio input with a cable
terminated with a 3.5 mm (1/8 inch) plug (for the analog
output)
S/PDIF audio source and receiver, each with optical cables
terminated with TOSLINK connectors (for digital
input/output)
SOFTWARE REQUIRED
SigmaStudio software, available for download from the
SigmaStudio product page
DOCUMENTS NEEDED
ADAU1467 data sheet
AD1937 data sheet
Mic Canvas user guide
AN-1006 Application Note
GENERAL DESCRIPTION
This user guide details the design, setup, and operation of the
E VA L-ADAU1467Z evaluation board. This board is suitable for
the evaluation of, and software development for, the ADAU1467
and ADAU1463 SigmaDSP® processors. Note that the ADAU1467
and the ADAU1463 are functionally identical; however, the
ADAU1467 has more program and data memory than the
ADAU1463. When using this evaluation board to evaluate the
ADAU1463, select the ADAU1463 block (see the SigmaStudio
section) rather than the ADAU1467, as shown in Figure 11.
Performing this action informs the compiler to limit the amount of
memory allocated to match the ADAU1463. All other procedures
and instructions in this user guide are identical for the
ADAU1463 and ADAU1467.
This evaluation board provides access to the digital serial audio
ports of the ADAU1467. Four analog inputs and eight analog
outputs are provided by the AD1937 codec included in the
evaluation kit. Switches enable the evaluation of alternate
features provided by many of the pins with multiplexed
functionality, and numerous headers provide access to serial
audio ports and the master and slave control ports. These
selectable modes and headers make the EVA L -ADAU1467Z
well suited to prototyping larger application circuits, as well as
initial device evaluation. The ADAU1467 core is programmed
using Analog Devices, Inc., SigmaStudio® software, which
interfaces to the evaluation board via a USB interface (USBi).
The on-board, electronically erasable programmable read only
memory (EEPROM) can be programmed for self boot mode.
The evaluation board is powered by a 6 V dc supply, which is
regulated to the voltages required on the board. The printed
circuit board (PCB) is a 4-layer design with a ground plane and a
power plane on the inner layers. The evaluation board includes
connectors for external analog inputs and outputs and optical
Sony/Philips Digital Interface (S/PDIF) interfaces. The master
clock is provided by the integrated oscillator circuit and the on-
board 12.288 MHz passive crystal.
For full details, see the ADAU1467 and AD1937 data sheets,
which must be used in conjunction with this user guide when
using the evaluation board.
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TABLE OF CONTENTS
Features .............................................................................................. 1
Evaluation Kit Contents................................................................... 1
Hardware Required .......................................................................... 1
Software Required ............................................................................ 1
Documents Needed.......................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
E VA L-ADAU1467Z Evaluation Board Photograph .................... 3
Setting Up the Evaluation Board .................................................... 4
Installing the SigmaStudio Software .......................................... 4
Disabling the Self Boot Switch.................................................... 4
Powering Up the Evaluation Board............................................ 5
Connecting the USBi ................................................................... 5
Connecting the Audio Cables..................................................... 6
Setting Up Communications in SigmaStudio............................ 8
Creating a Basic Signal Flow....................................................... 9
Downloading the Program to the DSP.................................... 11
Evaluation Board Features............................................................. 14
Reset ............................................................................................. 14
AD1937 Codec ........................................................................... 14
Serial Audio Data Input and Output ....................................... 17
Multipurpose Pins (MPx) ......................................................... 17
Status LEDs ................................................................................. 18
Auxiliary ADC Pins ................................................................... 19
Controlling Volume with a Potentiometer ............................. 19
S/PDIF Input and Output.......................................................... 22
Self Boot....................................................................................... 26
Slave Control Port ...................................................................... 28
Master Control Port ................................................................... 28
Mic Canvas Connector.............................................................. 28
Evaluation Board Hardware.......................................................... 29
IC Descriptions........................................................................... 29
Status LED Descriptions............................................................ 29
Evaluation Board Schematics and Artwork................................ 30
Ordering Information.................................................................... 51
Bill of Materials........................................................................... 51
Related Links................................................................................... 54
REVISION HISTORY
10/2017—Revision 0: Initial Version
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EVAL-ADAU1467Z EVALUATION BOARD PHOTOGRAPH
Figure 1.
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SETTING UP THE EVALUATION BOARD
Using the E VA L -ADAU1467Z evaluation board requires a PC
running Windows® XP or later with a USB interface and an
internet connection. The PC communicates with the evaluation
board using the included USBi interface. The software tool chain
used with the ADAU1467 is SigmaStudio, a fully graphical user
interface (GUI)-based programming environment. No DSP
programming is required. A full version of SigmaStudio, which
includes a library of DSP building blocks and the required USBi
drivers, is available for download from the SigmaStudio
software page on the Analog Devices website at
www.analog.com/SigmaStudio.
INSTALLING THE SigmaStudio SOFTWARE
To download the latest version of SigmaStudio, take the
following steps:
1. Go to the SigmaStudio software page on the Analog
Devices website, and select the latest version of the
SigmaStudio software from the Downloads and Related
Software section.
2. Determine whether the software must be installed on a
32-bit or 64-bit version of Windows, and locate the latest
release version of SigmaStudio as appropriate.
3. Download the installer and execute the executable.
Follow the prompts, and accept the license agreement to
install the software.
The drivers for the USBi are installed automatically by the
SigmaStudio installer. This may be confirmed by taking the
following steps:
1. Using the included cable, connect the USBi to the
computer.
2. Check that both the yellow I2C LED and the red power
indicator LED are illuminated (see Figure 3).
3. In the Windows Device Manager, under the Universal
Serial Bus controllers section, check that Analog Devices
USBi (programmed) is displayed (see Figure 2).
Figure 2. Confirming Driver Installation Using the Device Manager
Figure 3. State of the USBi Status LEDs After Driver Installation
DISABLING THE SELF BOOT SWITCH
When setting up the EVAL-ADAU1467Z evaluation board,
ensure that the SELFBOOT switch is in the off position.
SELFBOOT is the first switch of the four position, dual inline
package (DIP) switches, S3. The off position is toward the
bottom of the board, away from the silkscreen label, SELFBOOT.
The default position of this switch is the off (disabled) position,
which prevents the ADAU1467 from executing a self boot
operation at power-up. When the switch is in the on position, the
LED D3 is illuminated, and a self boot operation is executed,
causing the ADAU1467 to attempt to load code from the
EEPROM (U10) when it powers up or comes out of reset.
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POWERING UP THE EVALUATION BOARD
Power is supplied to the evaluation board using a dc power
supply with a female positive center plug. The plug has a 2.1 mm
inner diameter, a 5.5 mm outer diameter, and a 9.5 mm length
(see
Figure 4). The output must range between 4.5 V and 7 V and
must be able to source at least 1.5 A of current. Connect the power
supply to Connector J4. The unregulated supply powers the
operational amplifiers used in the active audio filters for the
analog audio inputs and outputs. An on-board linear regulator
(U17) generates the 3.3 V dc supply required for the ADAU1467
and AD1937, as well as other supporting ICs. When the power
supply is connected properly, LED D9 illuminates.
Figure 4. DC Power Supply Plug and Cable
To power up the evaluation board, take the following steps:
1. Connect the included power supply to the wall outlet
(100 V to 240 V, ac 50 Hz to 60 Hz).
2. Connect the female plug of the power supply to the J4 male
connector on the E VA L -ADAU1467Z, as shown in Figure 5.
3. After the power supply is connected, the D9 status LED
(A_3V3) illuminates.
Figure 5. Connecting the Power Supply
CONNECTING THE USBI
Connect the ribbon cable of the USBi to the control port of the
E VA L-ADAU1467Z (see Figure 6). The USBi must already be
connected to the USB 2.0 port of the computer. When the USBi
is connected properly, LED D8 illuminates.
Figure 6. Connecting the USBi to the Serial Peripheral Interface (SPI)
Control Port Header
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CONNECTING THE AUDIO CABLES
To connect the audio cables to the evaluation board, take the
following steps:
1. Connect a stereo audio source to J14 (IN1) with a standard
3.5 mm (1/8 inch) stereo tip, ring, sleeve (TRS) audio cable.
The audio signals must be single-ended and line level, with a
maximum voltage of 2.8 V p-p (1.0 VRMS). The tip of the
plug is the left channel of audio, the ring is the right channel
of audio, and the sleeve is the common or ground.
2. Connect headphones or powered speakers to J12 (OUT1).
Figure 7 shows the input source connection. Figure 8 shows the
output connection. Figure 9 shows the location of the
connectors on the board.
Figure 7. Analog Stereo Input Source Connection
Figure 8. Analog Stereo Output Connection
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Figure 9. Location of Stereo Output OUT1 (J12) and Stereo Input IN1 (J14)
OUT1
IN1
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SETTING UP COMMUNICATIONS IN SigmaStudio
To set up communications in SigmaStudio, take the following steps:
1. Start the SigmaStudio software by double clicking the
shortcut on the desktop or by finding and executing the
executable file in Windows Explorer.
2. To create a new project, select New Project from the File
menu or press CTRL + N. (The default view of the new
project is the Hardware Configuration tab.)
3. In the Hardware Configuration tab, add the appropriate
components to the project space by clicking and dragging
them from the Tre e To olBox on the left of the window to
the empty white space located on the right of the window.
a. Click USBi to add a USBi component from the
Communication Channels subsection of the toolbox
(see Figure 10).
Figure 10. Adding the USBi Communication Channel
b. Add an ADAU1467 component from the Processors
(ICs/DSPs) subsection of the toolbox (see Figure 11).
Figure 11. Adding an ADAU1467
4. Ensure that SigmaStudio can detect the USBi on the USB
port of the PC as follows:
a. When SigmaStudio detects the USBi, the background
of the USB label is green in the USB Interface box
(see Figure 12).
Figure 12. USBi Detected by SigmaStudio
b. When SigmaStudio cannot detect the USBi on the
USB port of the PC, the background of the USB label
is red (see Figure 13). This error can occur when the
USBi is not connected or when the drivers are
installed incorrectly.
Figure 13. USBi Not Detected by SigmaStudio
c. To connect the USBi block (USB interface) to the
target integrated circuit (IC) block of the ADAU1467,
click and drag a line, representing a wire, between the
blue pin of the USBi and the green pin of the IC (see
Figure 14). This connection allows the USBi to
communicate with the ADAU1467. The
corresponding dropdown box of the USBi
automatically fills with the default mode and channel
for that IC. In the case of the ADAU1467, the default
communications mode is SPI, the default slave select
line is 1, and the default address is 0.
Figure 14. Connecting the USBi to an ADAU1467 in the Hardware
Configuration Tab
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CREATING A BASIC SIGNAL FLOW
To create a signal processing flow, take the following steps:
1. Click the Schematic tab near the top of the window (see
Figure 15).
Figure 15. Schematic Tab
2. To add the appropriate elements to the project space, click
and drag the elements from the Tre e ToolB ox on the left of
the window to the empty white space located on the right of
the window. The toolbox contains all of the algorithms that
can run on SigmaDSP.
a. To add an Input block, from the (IC1) ADAU1467 >
IO > Input > sdata 32-39 folder, click Input (see
Figure 16) and drag it into the project space to the right
of the toolbox (see Figure 17). By default, Channel 0
and Channel 1 are selected. This configuration matches
the analog audio source hardware connections shown
in Figure 7 and Figure 8; therefore, no modifications are
required.
Figure 16. Input Block Selection
Figure 17. Input Block
b. Add two Output blocks as follows, ensuring that these
blocks are assigned to Channel 0 and Channel 1:
i. From the (IC1) ADAU1467 > IO > Output folder,
click Output (see Figure 18) and drag it into the
project space to the right of the toolbox.
Figure 18. Output Block Selection
ii. Repeat the previous step to add another output
(see Figure 19).
Figure 19. Output Blocks
3. To connect each input channel to its corresponding output
channel, click and drag a line, representing a wire, between
the blue pin of the input channel and the green pin of the
output channel (see Figure 20). Input Channel 0 connects
to Output Channel 0, and Input Channel 1 connects to
Output Channel 1.
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Figure 20. Connected Signal Flow with Stereo Input and Stereo Output
The default register settings in SigmaStudio are configured to
match the hardware of the E VA L-ADAU1467Z, including the
signal routing between the ADAU1467 and the AD1937 codec.
When these steps are complete, the basic signal flow is complete,
and the stereo analog input source passes directly through the
SigmaDSP and connects to the stereo analog output.
Add Volume Control
To add a volume control block, take the following steps:
1. From the Volume Controls > Adjustable Gain > Clickless
HW Slew folder, click Single Volume, and drag it into the
project space to the right of the toolbox.
Figure 21. Single Volume Block Selection
2. By default, the volume control block has one input and one
output.; in other words, it is a single channel. To add another
channel, right click in the empty white space of the Single-
Volume block, and, from the dropdown menu that appears,
select Grow Algorithm > 1. Gain (HW Slew) > 1 (see
Figure 22).
3. To delete the existing yellow connection wires (that is, the
connections added in Step 3 of the Creating a Basic Signal
Flow section), click the connection wires + Delete.
Figure 22. Growing the Volume Control to Two Channels
4. Connect the blocks as shown in Figure 23.
Figure 23. Completed Signal Flow with Volume Control
The schematic is ready to be compiled and downloaded to the
evaluation board.
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